2. 外语
  3. Next time you enter a username and password, think about the rhythm of your typing. Not only can it be used to identify you, it

Next time you enter a username and password, think about the rhythm of your typing. Not only can it be used to identify you, it

admin2013-04-08  11
问题     Next time you enter a username and password, think about the rhythm of your typing. Not only can it be used to identify you, it can reveal if you are in a stressful environment.
    It has long been known that the rhythms of a person’s typing style are【S1】______over time, leading to suggestions they could be used to【S2】______identity or even spot early signs of Alzheimer’s disease. But little was known about the effect of stress on typing【S3】______, so psychologist Mike Dowman and colleagues at the University of Abertay investigated.
    They asked 35 people to log into a computer 36 times over three【S4】______sessions up to a month apart, using the same username and password. People were put into【S5】______and relaxed states alternately(交替地)by listening to a range of sounds known to【S6】______particular emotions.
    The length of time each key was held down and the【S7】______between one being released and another pressed was recorded to generate a typing  "fingerprint" for each person. The team used the data to develop and test software that identifies a person from their typing style【S8】______.
     The data also showed that stress can be【S9】______in a person’s typing because it changes the pattern of timings.
    "There’s no question: people do type【S10】______under stress," says Dowman. He suggests that security systems could be designed to raise the alarm if it seems that a person might be being forced to log into a system. More research will be needed, however, before a system could tell if a person is, say, just having a bad day or being held at gunpoint.

A)stressed       B)alone      C)provoke         D)stable            E)interval
F)verify         G)only       H)unchangeable    I)differently       J)environments
K)detected       L)complete   M)normally        N)patterns          O)separatex
【S5】
选项
答案A
解析 此处应为形容词。下文的alternately表明此处意思与relaxed相反，stressed符合文意。
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